/* Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.ybg.activiti.rest.editor.model;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import org.activiti.editor.constants.ModelDataJsonConstants;
import org.activiti.engine.ActivitiException;
import org.activiti.engine.RepositoryService;
import org.activiti.engine.repository.Model;
import org.apache.batik.transcoder.TranscoderInput;
import org.apache.batik.transcoder.TranscoderOutput;
import org.apache.batik.transcoder.image.PNGTranscoder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.web.bind.annotation.*;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ObjectNode;

/** @author Tijs Rademakers */
@RestController
@RequestMapping(value = "/service")
public class ModelSaveRestResource implements ModelDataJsonConstants {
	
	protected static final Logger	LOGGER	= LoggerFactory.getLogger(ModelSaveRestResource.class);
	@Autowired
	private RepositoryService		repositoryService;
	@Autowired
	private ObjectMapper			objectMapper;
	
	@RequestMapping(value = "/model/{modelId}/save", method = RequestMethod.PUT)
	@ResponseStatus(value = HttpStatus.OK)
	public void saveModel(@PathVariable String modelId, @RequestParam("name") String name, @RequestParam("json_xml") String jsonXml, @RequestParam("svg_xml") String svgXml, @RequestParam("description") String description) {// 对接收参数进行了修改
		try {
			Model model = repositoryService.getModel(modelId);
			ObjectNode modelJson = (ObjectNode) objectMapper.readTree(model.getMetaInfo());
			modelJson.put(MODEL_NAME, name);
			modelJson.put(MODEL_DESCRIPTION, description);
			model.setMetaInfo(modelJson.toString());
			model.setName(name);
			repositoryService.saveModel(model);
			repositoryService.addModelEditorSource(model.getId(), jsonXml.getBytes("utf-8"));
			InputStream svgStream = new ByteArrayInputStream(svgXml.getBytes("utf-8"));
			TranscoderInput input = new TranscoderInput(svgStream);
			PNGTranscoder transcoder = new PNGTranscoder();
			// Setup output
			ByteArrayOutputStream outStream = new ByteArrayOutputStream();
			TranscoderOutput output = new TranscoderOutput(outStream);
			// Do the transformation
			transcoder.transcode(input, output);
			final byte[] result = outStream.toByteArray();
			repositoryService.addModelEditorSourceExtra(model.getId(), result);
			outStream.close();
		} catch (Exception e) {
			LOGGER.error("Error saving model", e);
			throw new ActivitiException("Error saving model", e);
		}
	}
}
